Ladder

Ladders are used to grant access to the different floors of the colony, as well as functioning as scaffolding structures for various projects throughout the base.

Usage
Duplicants can move both horizontally and vertically along Ladders, as well as walk on top of Ladders as if they were tiles. In both directions, Duplicants can jump one-tile gaps to another Ladder or other valid walking surface. This allows Ladders to be used for vertical movement and gas/liquid-permeable scaffolding. However, Ladders take much longer to construct than Tile, making them a poor option for urgent situations.

Ladders slightly decrease Decor, disincentivizing overuse of them in environments where Decor matters.

From any given Ladder, Duplicants can dig two tiles to either side, four tiles above, and three tiles below. This means it is possible to efficiently dig out large areas by placing Ladders in rows (skipping one tile between each) that are 7 tiles apart.

Mechanics

 * Ladders do not count as solid ground - structures cannot be built on them and ground-based Critters such as Hatches will not walk on them.
 * Ladders do not block liquid or gas flow, or solid objects.
 * Ladders do not block Light or Decor.